KR-102962172-B1 - Method for a terminal to transmit and receive signals in a wireless communication system supporting a side link, and a device for the same.

KR102962172B1KR 102962172 B1KR102962172 B1KR 102962172B1KR-102962172-B1

Abstract

A method and apparatus for receiving a signal in a wireless communication system supporting a side link according to various embodiments are disclosed, wherein a terminal receives a signal using at least one distributed antenna unit and a center antenna unit (CU) that controls the at least one distributed antenna unit (DU). The method and apparatus are disclosed, comprising the steps of receiving a first signal and a second signal using at least one DU, transmitting first information, which is decoding information for the first signal, from the at least one DU to the CU through a first interface, and decoding the second signal based on the first information using the CU, wherein a feedback signal for the second signal is transmitted based on a time gap set for the second signal, and the time gap is set considering a time delay or time error associated with the first interface.

Inventors

김희진
이승민

Assignees

엘지전자 주식회사

Dates

Publication Date: 20260508
Application Date: 20210719
Priority Date: 20200717

Claims (16)

In terms of method, A step in which the first device receives a control channel for direct communication between devices; The first device receives a data channel for direct communication between the devices based on the control channel; and The first device includes the step of performing decoding for the data channel based on first control information included in the control channel, and The first control information includes at least one of time resource information for the data channel, frequency resource information for the data channel, information on the format of the second control information, information on the DMRS (demodulation reference signal) pattern for the data channel, and information on the number of DMRS ports. The first device receives the control channel and the data channel using at least one distributed antenna unit (DU), and performs decoding of the data channel based on the first control information using a center antenna unit (CU). The first control information is transmitted from the at least one DU to the CU through the first interface, and A method in which a feedback signal for the above data channel is transmitted based on a time gap set for the above data channel, and the time gap is set considering a time delay or time error associated with the first interface.
delete
In paragraph 1, A method characterized in that, when a plurality of time gaps are set for a resource pool set for the first device, the time gap is selected as one time gap among the plurality of time gaps based on a time delay or time error related to the first interface.
In paragraph 1, A method characterized by further including the step of reporting capability information, including information about the time delay or the time error, to a base station.
In paragraph 1, A method characterized in that the first device transmits information about the set time gap to a counterpart device that has transmitted the control channel and the data channel.
In paragraph 1, A method characterized in that the first device transmits information about the maximum transmission rate supported by the first interface.
delete
In paragraph 1, A method characterized in that the above at least one DU performs at least one of CP (Cyclic Prefix) removal, FFT (Fast Fourier transform), and resource demapping on the data channel.
In paragraph 1, A method characterized in that the first interface transmits at least one of IQ (in-phase and quadrature) samples obtained from the data channel and timing information for the at least one DU in relation to the data channel from the at least one DU to the CU.
In terms of method, A step in which the second device receives capability information from the first device, including information regarding a time delay or time error related to the first interface; The second device sets a time gap for the resource pool based on the capability information; and The second device includes the step of transmitting a signal to the first device to allocate the resource pool with the time gap set, and The first interface is an interface for transmitting digital information between at least one distributed antenna unit and a center antenna unit provided in the first device, and The above time gap relates to the transmission timing of a feedback signal for the reception of a data channel for direct communication between devices, a method.
In the first device, RF (Radio Frequency) transceiver; and A processor connected to the above RF transceiver; including The processor receives a control channel for direct communication between devices, receives a data channel for direct communication between devices based on the control channel, and performs decoding of the data channel based on first control information included in the control channel. The first control information includes at least one of time resource information for the data channel, frequency resource information for the data channel, information on the format of the second control information, information on the DMRS (demodulation reference signal) pattern for the data channel, and information on the number of DMRS ports. The first device receives the control channel and the data channel using at least one distributed antenna unit (DU), and performs decoding of the data channel based on the first control information using a center antenna unit (CU). The first control information is transmitted from the at least one DU to the CU through the first interface, and A first device, wherein a feedback signal for the data channel is transmitted based on a time gap set for the data channel, and the time gap is set considering a time delay or time error associated with the first interface.
delete
delete
In a chipset controlling a first device, At least one processor; and It includes at least one memory that is operably connected to the at least one processor and, when executed, enables the at least one processor to perform operations, and The above operations are: Receive a control channel for direct communication between devices; Receiving a data channel for direct communication between the devices based on the above control channel; and It includes performing decoding for the data channel based on first control information included in the control channel, and The first control information includes at least one of time resource information for the data channel, frequency resource information for the data channel, information on the format of the second control information, information on the DMRS (demodulation reference signal) pattern for the data channel, and information on the number of DMRS ports. The first device receives the control channel and the data channel using at least one distributed antenna unit (DU), and performs decoding of the data channel based on the first control information using a center antenna unit (CU). The first control information is transmitted from the at least one DU to the CU through the first interface, and A chip set in which a feedback signal for the data channel is transmitted based on a time gap set for the data channel, and the time gap is set considering a time delay or time error associated with the first interface.
delete
In a computer-readable storage medium, It includes at least one computer program that performs operations when executed by at least one processor, and The above operations are, The first device receives a control channel for direct communication between devices; The first device receives a data channel for direct communication between the devices based on the control channel; and The first device performs decoding for the data channel based on first control information included in the control channel, and The first control information includes at least one of time resource information for the data channel, frequency resource information for the data channel, information on the format of the second control information, information on the DMRS (demodulation reference signal) pattern for the data channel, and information on the number of DMRS ports. The control channel and the data channel are received using at least one distributed antenna unit (DU) included in the first device, and decoding of the data channel is performed using a center antenna unit (CU) included in the first device. The first control information is transmitted from the at least one DU to the CU through the first interface, and A computer-readable storage medium in which a feedback signal for the data channel is transmitted based on a time gap set for the data channel, and the time gap is set considering a time delay or time error associated with the first interface.

Description

Method for a terminal to transmit and receive signals in a wireless communication system supporting a side link, and a device for the same. The present invention relates to a method for transmitting and receiving signals using at least one distributed antenna unit and a center antenna unit (CU) in a wireless communication system that supports sidelink, and to an apparatus for the same. A wireless communication system is a multiple access system that supports communication with multiple users by sharing available system resources (e.g., bandwidth, transmission power, etc.). Examples of multiple access systems include CDMA (code division multiple access), FDMA (frequency division multiple access), TDMA (time division multiple access), OFDMA (orthogonal frequency division multiple access), SC-FDMA (single carrier frequency division multiple access), and MC-FDMA (multi carrier frequency division multiple access) systems. Sidelink (SL) refers to a communication method in which User Equipment (UE) establishes a direct link to directly exchange voice or data between terminals without passing through a Base Station (BS). SL is being considered as a solution to address the burden on base stations caused by rapidly increasing data traffic. V2X (vehicle-to-everything) refers to a communication technology that exchanges information with other vehicles, pedestrians, and infrastructure-equipped objects through wired or wireless communication. V2X can be classified into four types: V2V (vehicle-to-vehicle), V2I (vehicle-to-infrastructure), V2N (vehicle-to-network), and V2P (vehicle-to-pedestrian). V2X communication can be provided through PC5 interfaces and/or Uu interfaces. Meanwhile, as more communication devices require larger communication capacities, the need for improved mobile broadband communication compared to existing Radio Access Technology (RAT) is emerging. Accordingly, communication systems considering services or terminals sensitive to reliability and latency are being discussed; next-generation radio access technology that incorporates improved mobile broadband communication, Massive Machine Type Communication (MTC), and Ultra-Reliable and Low Latency Communication (URLC) can be referred to as new radio access technology (new RAT) or new radio (NR). Vehicle-to-everything (V2X) communication can also be supported in NR. Figure 1 is a diagram illustrating a comparison between V2X communication based on RAT prior to NR and V2X communication based on NR. Regarding V2X communication, prior to NR, RATs mainly discussed methods for providing safety services based on V2X messages such as BSM (Basic Safety Message), CAM (Cooperative Awareness Message), and DENM (Decentralized Environmental Notification Message). V2X messages can include location information, dynamic information, attribute information, etc. For example, a terminal can transmit a CAM of the periodic message type and/or a DENM of the event-triggered message type to another terminal. For example, the CAM may include basic vehicle information such as dynamic state information of the vehicle, such as direction and speed, static data of the vehicle, such as dimensions, external lighting conditions, and route history. For example, a terminal may broadcast the CAM, and the latency of the CAM may be less than 100ms. For example, in the event of an unexpected situation such as a vehicle breakdown or accident, the terminal may generate a DENM and transmit it to other terminals. For example, all vehicles within the transmission range of the terminal may receive the CAM and/or DENM. In this case, the DENM may have a higher priority than the CAM. Since then, regarding V2X communication, various V2X scenarios have been presented in NR. For example, various V2X scenarios may include vehicle platooning, advanced driving, extended sensors, remote driving, etc. For example, based on vehicle platooning, vehicles can dynamically form groups and move together. For example, to perform platoon operations based on vehicle platooning, vehicles belonging to said group can receive periodic data from the lead vehicle. For example, vehicles belonging to said group can use said periodic data to reduce or increase the distance between vehicles. For example, based on enhanced driving, vehicles can be semi-automated or fully automated. For example, each vehicle can adjust trajectories or maneuvers based on data acquired from local sensors of nearby vehicles and/or nearby logical entities. Additionally, for example, each vehicle can mutually share driving intentions with nearby vehicles. For example, based on extended sensors, raw data or processed data or live video data acquired through local sensors can be exchanged between vehicles, logical entities, pedestrian terminals and/or V2X application servers. Thus, for example, a vehicle can perceive an environment that is enhanced compared to the environment it can detect using its own sensors. For example, based on remote driving, a r